FNUS75 KBOI 261537
FWSBOI

SPOT FORECAST FOR ALKALI TUMBLEWEED...VALE BLM
NATIONAL WEATHER SERVICE BOISE ID
937 AM MDT SUN APR 26 2009

FORECAST IS BASED ON IGNITION TIME OF 0920 MDT ON APRIL 26.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WINDY ON THE RIDGES TODAY...
...DRY AND WARMER WITH INCREASING CLOUDINESS MONDAY...

.DISCUSSION...
AN UPPER LEVEL LOW IN EASTERN IDAHO WILL BE PULLING AWAY THIS
AFTERNOON AS AN ASSOCIATED UPPER LEVEL JET STREAK MOVES FROM OVER
SE OREGON THIS MORNING TO OVER EASTERN NV THIS AFTERNOON. WINDS
WILL GO TO LIGHT DRAINAGE TONIGHT UNDER WEAK SURFACE HIGH PRESSURE
THEN LOOK FOR A THERMAL TROUGH OVER NV TO LIFT INTO SE OREGON
MONDAY FOR WARMER AND DRIER CONDITIONS. AN UPPER LEVEL TROUGH
CARVING OUT A LOW FROM WASHINGTON TO OREGON MONDAY WILL LIKELY
BRING OVERCAST SKIES TO THE BURN IN THE AFTERNOON.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY. 5 TO 10 PERCENT CUMULUS.
MAX TEMPERATURE.....57 TO 58.
MIN HUMIDITY........18 TO 22 PERCENT.
WIND - EYE LEVEL....NORTHWEST 5 TO 8 MPH AT ALKALI WITH
    RIDGE TOP WINDS NORTH AROUND 20 MPH.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......8500 FT AGL.
TRANSPORT WIND......NORTH AROUND 20 MPH.
VENTILATION INDEX...1700 EXCELLENT.

.TONIGHT...

SKY/WEATHER.........CLEAR IN THE EVENING THEN 10 TO 30 PERCENT
                    HIGH CLOUDINESS MIDNIGHT TO 6AM.
MIN TEMPERATURE.....33.
MAX HUMIDITY........65 PERCENT.
WIND - EYE LEVEL....NORTHEAST 2 TO 4 MPH BECOMING LIGHT EAST LESS
                    THAN 3 MPH BY MIDNIGHT.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......1500 FT AGL.
TRANSPORT WIND......NORTHEAST AROUND 10 MPH.
VENTILATION INDEX...150 POOR.

.MONDAY...

SKY/WEATHER.........MOSTLY CLOUDY.
MAX TEMPERATURE.....58 TO 63.
MIN HUMIDITY........28 TO 33 PERCENT.
WIND - EYE LEVEL....WEST AROUND 3 MPH IN THE MORNING...SHIFTING TO
                    THE SOUTHWEST 3 MPH WITH GUSTS AROUND 7 MPH
                    IN THE AFTERNOON.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......7500 FT AGL.
TRANSPORT WIND......SOUTHEAST AROUND 7 MPH.
VENTILATION INDEX...525 GOOD.

$$
FORECASTER...MILLS
REQUESTED BY...FRISBY
TYPE OF REQUEST...PRESCRIBED
.TAG 20090426.ALKAL.01/BOI